Curb-bar.



T. H. KANE.

CURB BAR.

APPLICATION FILED JULY 24. 1914.

1 9, 1. 3 Patented Dec. 26, 1916.

anmtoz THOMAS HENRY KANE, OF YOUNGSTOWN, STEEL COMPANY, OF DETROIT, MICHI OHIO, ASSIGNOR T0 TRUSSED CONCRETE GAN, A CORPORATION OF MICHIGAN.

CURB-BAR.

Specification of Letters Patent.

Patented Dec. 26, 1916..

Application filed July 24, 1914. Serial No. 852,779.

To all whom it may concern:

Be it known that I, THOMAS H. KANn, a citizen of the United States, and a resident of Youngstown, in the county of Mahoning and State of Ohio, have invented a new and Improved Curb-Bar, of which the following is a specification.

This invention relates to means for protecting the edges of concrete and structures of plastic material such as -columns, curbs, steps and slabs, and its object is to so form the anchoring member that it will embrace a maximum amount of the plastic material.

The invention consists in the details of construction shown in the accompanying drawing and particularly pointed out in claims.

In the drawing, Figure 1 is a perspective view of this improved curb-bar, one end being embedded in a slab of plastic material.

Fig. 2 is a cross-section of a curb-bar em bedded in plastic material. Fig. 3 is a section of a column reinforced by means of rings and rods and having its corners protected by means of bars embodying the present invention.

of the body 1, as indicated by Similar reference characters refer to like parts throughout the several views.

The curb-bar shown in the drawings is rolled to the desired cross-section to comprise a segmental or trough-shaped body 1,

preferably constituting a curve of ninety degrees so that fiat surfaces at right angles to each other will be-tangent to the curvature of this body at the lines of contact therewith as indicated in the drawings. The edges 2 of the body preferably form .acute angles with the curved surfaces in order to permit the corners 3 of the concrete 4 to be obtuse, thus preventing crumbling of these corners.

Extending radially and inwardly from the inner or concave face of the body 1, is a web comprising the relatively thicker base portion 5, and the thinner main part 5. Within the inner main part of the Web 5 are formed holes or apertures, preferably having parallel sides, as indicated at 7 and in dotted lines at 7", Fig. 1, the upper sides or edges 7 being closely adjacent the base portion 5*, and approximately within the area or space bounded. by the inner edges the dotted line w-w in Fig. 2.

As it is'one of the objects of my invention to enable the anchoring web 5 to surround and engage as large an amount of concrete or other plastic material as possible, at the expense of a minimum amount of metal, in addition to locating the upper and substantially straight edges 7 of the apertures closely adjacent to and in 006perative relationship with the body 1, I make their longitudinal dimension as great as possible, consistent with leaving suflicient metal 7, for strength, between the apertures, and in addition, extend their area laterally, by displacing the cross bars or pieces 6, constituting the lower boundary of the apertures, out beyond the parallel edge 7 of the web, thereby forming a serrated edge to the web 5, within the serrations of which the concrete or cementitious material engages, thereby materially adding to the engagement of the concrete or cementitious material in' the web. This construction insures a rigid union between .the body 1 of the structure and the cement or cementitious material to be protected thereby, and presents a maximum amount of anchoring surface for the body 1, at the expense of a minimum amount of metal, whereby its resistance to displacing strains is materially increased over like structures which have preceded my invention.

The outwardly extending cross-bars or pieces 6 readily allow a bending or curving of the curb-bar so that the same can be bent on a curve or on various angles to go around corners and the like. While these expanded strips 6 mayextend at any desired angle from the plane of the web, I prefer that it shall remain in such plane, for when so positioned it reaches a greater depth of concrete, resulting in a stronger union between the bar and the plastic material and in less liability to cause the concrete to crack than when these members were twisted.

While Figs. 1 and 2 show tion to protect the edges sidewalk-slabs and similar the bar in posiof steps, curbs, structures, Fig.

. 3 shows how these bars may be employed to protect the edges of other upright structures.

I claim 1. A curb bar comprising a body portion, and a web extending outwardly therefrom, the outer edge of the web being laterally extended atintervals to form a serrated an pillars, posts or choring surface, and the web having apertures formed therein between said serrated outer edge and the body portion and extending into the laterally extended portion; the laterally extended portions of the outer edge of said web allowing a bending of the said Web for corners and the like.

2. A curb bar, comprising a segmental body portion and a web projecting radially.

from the concave side thereof, the base of said web being thicker than the main part of it, said main part having a row of apertures formed therein, the metal left between the outer sides of said apertures and the outer edge of the Web being displaced outwardly to increase the size of the apertures and to form a serrated web edge.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

THOMAS HENRY KANE.

Witnesses e H. B. FOLSOM, E. R. Aims. 

